For most traits, phenotypic variation is continuous and caused by genetic variation in multiple genes, interactions among these genes, and interactions with the environment. The field of quantitative genetics focuses on these so-called quantitative traits, aiming to understand the genetic architecture underlying trait variation as well as the evolutionary causes and consequences of this variation. Quantitative genetics plays a key role in understanding the origins of biodiversity, diseases affecting human health, the impacts of climate change, and selective breeding of plants and animals. This collection highlights a series of important papers that delve into some fundamental questions in this field.
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Magnus NordborgReviewing Editor